Siemens / ITE JKL3B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE JKL3B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in replacement for aging commercial systems, the Siemens JKL3B125 restores reliable power distribution. This 3-pole, 125A molded case circuit breaker features a thermal-magnetic trip unit with fixed thermal and adjustable magnetic settings. Designed to mount into Siemens and ITE P4, P5, S5, and CDP-6 panelboards, it eliminates the need for FXD63B125 retrofit kits. Rated 65kAIC at 240V and 35kAIC at 480V, this HACR-rated J-frame breaker handles demanding industrial loads safely.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | JKL3B125-R |
| Series | JKL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | JKL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens / ITE P4, P5, S5, CDP-6 Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Interchangeable Trip |
Product FAQs
5 answersWhich Siemens and ITE panelboards are compatible with the JKL3B125 breaker?
This bolt-on circuit breaker is designed for use in Siemens and legacy ITE P4, P5, S5, and CDP-6 panelboards.
What type of conductors can be terminated on the JKL3B125?
The factory-installed lugs accept both copper and aluminum conductors, accommodating wire sizes from 4 AWG to 300 kcmil. Ensure proper torque specifications are followed during installation.
How does the trip unit operate on the JKL3B125?
It utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. This allows electricians to coordinate the instantaneous trip point with downstream devices.
How is the JKL3B125 secured inside the panelboard?
It is a bolt-on breaker that mounts directly to the busbars of compatible Siemens and ITE panelboards. Depending on the specific panelboard model, such as a CDP-6 or P4, a dedicated mounting strap kit or connecting hardware is required for installation.
Can this breaker replace older ITE JKL models?
Yes, this unit is part of the legacy J-Frame group and will physically fit and function as a direct replacement for older ITE or Siemens JKL frame breakers with identical pole and amperage configurations.
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